A player whose rating is 100 points greater than their opponent's is expected to score 64%; if the difference is 200 points, then the expected score for the stronger player is 76%.
What would my OTB rating be?

If this is your first rated OTB tournament and you speak in USCF ratings, your USCF rating should be about 1100-1200. If these players have an average rating of 1000 online, its hard to say, you could be rated anywhere from 150-850.
always thought you just add 400 for each win and-400 for each loss to the player's rating you played against, then take the average. In this case if they are all 1000, you should have a provisional rating of around 1400 if you went 4 0.
It's a little tricky since your unrated so I just put 1000 for you. This looks wrong though idk
In regards to the calculation I believe it is wrong. I think you are using a calculator for an already rated player, vs a calculator for an unrated player. Fide requires 5 rounds to get a rating, but your rating, @AstroDogePlaysChess, would be 1,080. For your initial rating, everything is based around scoring a 50%. Here's an article: https://chessdelta.com/how-to-get-fide-rating/
Later in the article it addresses how you would calculate your initial rating. Because we are looking at the initial rating, Fide bases your rating on the average opponent rating at the event and a 50% score at the event. That is your starting point. Basically, as you scored over 50%, we take the difference between your score (4/4) and a 50% score (2/4) and add 20 points for each half point (.5) of your score. You scored 2 full points over 2 [4-2 = 2] which is 4 half points over the 50% score of 2. This means we add 20 points onto the average rating of the opponents at the event four times.
So, assuming 1,000 rating, you would have a rating of 1,080.
I just reread this and it seems overly confusing. Just read the article or take my word for it.
(Incidentally, 50% of a 4 round event is 2, 50% of an 8 round event is 4, 50% score at The Candidates [a 14 round event] is a 7. So "scoring a 50%" is literally just taking the number of rounds in an event and cutting it in half.)
Incidentally, if you go undefeated at any event, then you are likely well above the average strength of the opponents there. Although this is how FIDE would rate you, you will likely find yourself doing quite well in 1300+ events (I'm fairly low rated, so I'm not sure how much stronger you are). Even if only because you appear to have good nerves during in-person OTB events.

What would my OTB rating be?
Your OTB rating would be what your OTB rating is when you start playing

It's a little tricky since your unrated so I just put 1000 for you. This looks wrong though idk
I think it would be a little higher no? my guess is 1600ish

It's a little tricky since your unrated so I just put 1000 for you. This looks wrong though idk
In regards to the calculation I believe it is wrong. I think you are using a calculator for an already rated player, vs a calculator for an unrated player. Fide requires 5 rounds to get a rating, but your rating, @AstroDogePlaysChess, would be 1,080. For your initial rating, everything is based around scoring a 50%. Here's an article: https://chessdelta.com/how-to-get-fide-rating/
Later in the article it addresses how you would calculate your initial rating. Because we are looking at the initial rating, Fide bases your rating on the average opponent rating at the event and a 50% score at the event. That is your starting point. Basically, as you scored over 50%, we take the difference between your score (4/4) and a 50% score (2/4) and add 20 points for each half point (.5) of your score. You scored 2 full points over 2 [4-2 = 2] which is 4 half points over the 50% score of 2. This means we add 20 points onto the average rating of the opponents at the event four times.
So, assuming 1,000 rating, you would have a rating of 1,080.
I just reread this and it seems overly confusing. Just read the article or take my word for it.
(Incidentally, 50% of a 4 round event is 2, 50% of an 8 round event is 4, 50% score at The Candidates [a 14 round event] is a 7. So "scoring a 50%" is literally just taking the number of rounds in an event and cutting it in half.)
Incidentally, if you go undefeated at any event, then you are likely well above the average strength of the opponents there. Although this is how FIDE would rate you, you will likely find yourself doing quite well in 1300+ events (I'm fairly low rated, so I'm not sure how much stronger you are). Even if only because you appear to have good nerves during in-person OTB events.
Thank you for spending your time with this post. This answered all of my questions.

From my experience, USCF OTB is a LOT lower then chess.com ratings. When playing my first tournament, I was meeting 1100 USCF players that had an 1800 chess.com rapid. The games are usually more positional and blunders are very very rare. It is difficult playing with players with ratings of a 1000. If you want to improve OTB rating, you honestly just need to play longer time controls where your opponent doesn't blunder and pieces and play actively.

From my experience, USCF OTB is a LOT lower then chess.com ratings. When playing my first tournament, I was meeting 1100 USCF players that had an 1800 chess.com rapid. The games are usually more positional and blunders are very very rare. It is difficult playing with players with ratings of a 1000. If you want to improve OTB rating, you honestly just need to play longer time controls where your opponent doesn't blunder and pieces and play actively.
Yes, this is the case, especially in scholastic tournaments (kids play muchj stronger in tournament for whatever reason) im 18-1900 chesscom rapid and 1078 is my current and peak uscf rating (keep in mind i basically only play scholasic tournaments)
I recently played in a tournament at my local school, I went 4-0 in a swiss tournament. If my opponents had an average rating of about 1000, what would my OTB rating be?